﻿using System;
using System.Collections.Generic;
using System.Data;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace btnet.pages
{
    public partial class search_text : CommonPage
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            security = new Security();
            security.check_security(HttpContext.Current, Security.ANY_USER_OK);

            Lucene.Net.Search.Query query = null;

            try
            {
                if (string.IsNullOrEmpty(Request["query"]))
                {
                    throw new Exception("You forgot to enter something to search for...");
                }

                query = MyLucene.parser.Parse(Request["query"]);

            }
            catch (Exception e3)
            {
                display_exception(e3);
            }


            Lucene.Net.Highlight.QueryScorer scorer = new Lucene.Net.Highlight.QueryScorer(query);
            Lucene.Net.Highlight.Highlighter highlighter = new Lucene.Net.Highlight.Highlighter(MyLucene.formatter, scorer);
            highlighter.SetTextFragmenter(MyLucene.fragmenter); // new Lucene.Net.Highlight.SimpleFragmenter(400));

            StringBuilder sb = new StringBuilder();
            string guid = Guid.NewGuid().ToString().Replace("-", "");
            Dictionary<string, int> dict_already_seen_ids = new Dictionary<string, int>();

            sb.Append(@"
create table #$GUID
(
temp_bg_id int,
temp_bp_id int,
temp_source varchar(30),
temp_score float,
temp_text nvarchar(3000)
)
    ");

            lock (MyLucene.my_lock)
            {

                Lucene.Net.Search.Hits hits = null;
                try
                {
                    hits = MyLucene.search(query);
                }
                catch (Exception e2)
                {
                    display_exception(e2);
                }

                // insert the search results into a temp table which we will join with what's in the database
                for (int i = 0; i < hits.Length(); i++)
                {
                    if (dict_already_seen_ids.Count < 100)
                    {
                        Lucene.Net.Documents.Document doc = hits.Doc(i);
                        string bg_id = doc.Get("bg_id");
                        if (!dict_already_seen_ids.ContainsKey(bg_id))
                        {
                            dict_already_seen_ids[bg_id] = 1;
                            sb.Append("insert into #");
                            sb.Append(guid);
                            sb.Append(" values(");
                            sb.Append(bg_id);
                            sb.Append(",");
                            sb.Append(doc.Get("bp_id"));
                            sb.Append(",'");
                            sb.Append(doc.Get("src"));
                            sb.Append("',");
                            sb.Append(Convert.ToString((hits.Score(i))).Replace(",", "."));  // Somebody said this fixes a bug. Localization issue?
                            sb.Append(",N'");

                            string raw_text = Server.HtmlEncode(doc.Get("raw_text"));
                            Lucene.Net.Analysis.TokenStream stream = MyLucene.anal.TokenStream("", new System.IO.StringReader(raw_text));
                            string highlighted_text = highlighter.GetBestFragments(stream, raw_text, 1, "...").Replace("'", "''");
                            if (highlighted_text == "") // someties the highlighter fails to emit text...
                            {
                                highlighted_text = raw_text.Replace("'", "''");
                            }
                            if (highlighted_text.Length > 3000)
                            {
                                highlighted_text = highlighted_text.Substring(0, 3000);
                            }
                            sb.Append(highlighted_text);
                            sb.Append("'");
                            sb.Append(")\n");
                        }
                    }
                    else
                    {
                        break;
                    }
                }
                //searcher.Close();
            }


            sb.Append(@"
select '#ffffff', bg_id [id], bg_short_desc [desc] ,
	temp_source [search_source] ,
	temp_text [search_text],
	bg_reported_date [date],
	isnull(st_name,'') [status],
	temp_score [$SCORE]
from bugs
inner join #$GUID t on t.temp_bg_id = bg_id and t.temp_bp_id = 0
left outer join statuses on st_id = bg_status
where $ALTER_HERE

union

select '#ffffff', bg_id, bg_short_desc,
	bp_type + ',' + convert(varchar,bp_id) COLLATE DATABASE_DEFAULT,
	temp_text,
	bp_date,
	isnull(st_name,''),
	temp_score
from bugs
inner join #$GUID t on t.temp_bg_id = bg_id
inner join bug_posts on temp_bp_id = bp_id
left outer join statuses on st_id = bg_status
where $ALTER_HERE

order by t.temp_score desc, bg_id desc

drop table #$GUID

");

            string sql = sb.ToString().Replace("$GUID", guid);
            sql = Bug_Util.alter_sql_per_project_permissions(sql, security);


            DataSet ds = DbUtil.get_dataset(sql);
            Session["bugs_unfiltered"] = ds.Tables[0];
            Session["bugs"] = new DataView(ds.Tables[0]);

            Session["just_did_text_search"] = "yes"; // switch for bugs.aspx
            Session["query"] = Request["query"]; // for util.cs, to persist the text in the search <input>
            Response.Redirect("bugs.aspx");
        }

        protected void display_exception(Exception e)
        {
            string s = e.Message;
            if (e.InnerException != null)
            {
                s += "<br>";
                s += e.InnerException.Message;
            }
            Response.Write(@"
<html>
<link rel=StyleSheet href=btnet.css type=text/css>
<p>&nbsp;</p>
<div class=align>
<div class=err>");


            Response.Write(s);

            Response.Write(@"
<p>
<a href='javascript:history.go(-1)'>back</a>            
</div></div>
</html>");

            Response.End();

        }   
        
    }
}
